Door-lock



WfR. SCHLAGE.

DOOR LOCK.

APPLICATION FILED MAR.291917.

1,313,920. Patented Aug. 26,1919.

2 SHEETS-SHEET WITNESSES z IN VENTOR .W. R. SCHLAGE.

DOOR LOCK.

APPLlcAnoN min MAn.29.1911

Patented Aug. 26, 1919.

2 SHEETS-SHEET 2.

l i I WITNESSES: I INVENTOR WuzwRSc/dag,

Ammazza NITED. sTATEs PATENT OFFICE.

WALTER. B. SCHLAGE, OF BERKELEY, CAIIIFOBNIA.. l

DUDE-LOCK.

' Application med much a9,

To all rwhom it may concern Be it known that I, WALTER R. ScHLAeE, a citizen of the United States, residing at Berkele in the county of Alameda and State o California, have invented new andV useful Improvements in Door-Locks, of which the following is a specification. f

This invention relates to a door lock.

One of the objects of the present invention. is to provide a simple, substantial, cheaply manufactured, easily applied locking mechanism operated'by thedoor knob whereby the latch in aj door lock ,may be locked against movement when extended. Anotherl object of the invention is to lock the knob, the spindle and the hub against turningI movement and the latch against de-4 pression by a jimmy and also to provide means. for lvisibly indicating `whether or not the door is locked. Further objects will hereinafter appear.

-The invention consists of the parts and the construction and combination of parts hereinafter `more A. fully described and `j'clanned, having reference to the accompanying drawings, in whichl Figure 1 is a central, vertical section through the lock, showing the construction of lthe lock; t

Fig. 2 is a cross section on the line 2-2 of Fig. 1; Fig.- 3 is a plan section on the line 3 3 of Fig. 2;

Fig. 4 is a side elevation similar to Fig. 1 showing the application of the invention to a. lock of the easy-latch type;

Fig. 5 is a perspective view of the link 25.

Referring tothe drawings in detail, A indicates the caslng of a mortise door lock, 2 .the front plate, 3 the latch, .4 the latchr plate, thev rear end of which is fork-shaped to straddle the spindle 5 and the hub 6, and

I which is 'also provided with-a pair of upturned shoulders 7 adapted to be engaged f 9 indicates an ordinary bon, 1o ai@ bolt bar, which; together with the bolt, is adapted to be retracted'or vextended by means of an ordinary key inserted through a hole 11; the latch 3 and the bolt 9 being held in their normal positions byV means of a coiled spring `12-secu1'ed upon the hub 13 formed within the casing Formed in the casingl on the rear side of the hub 6 is astop 14 over which the latch plate 4 is normally adapted 'to ride when the spindles and hub are turned Specification of Letters Patent. Patented Allg. 26, 1919.

1917. Serial N0. 158,189. i

eitherby the inside or outside knob under normal conditions.

Mounted'below the latch plate are a pair of flat springs 15 and 16. These springs are secured at their forward ends by means of screws 17 upon a pad 18 formed within the casmg and their upper faces are such that they will form a' guide' and support for the latch p1ate,'which will permit the latch plate to move back over the stop 14, the upward movement of the springs 15 and 16 being limited by a shoulder lug v19 positioned adjacent or just above the stop 14. In other words, the springs 15 and 16 normally 11e on 'a plane flush with the top surface of the stop 14 and in said position form a' guide and support for the latch plate 4.

Rigidlysecured in the usual manner on the outside end of the spindle 4 is a door knob 20 and pivotally securedwas at 21, on the inside end of the spindle is a door knob 22. Formed on the inner end of the' door knob is a sphere-shaped extension 23 and forr'ned on the inner face of said sphere-v shaped projection is a semi-circular notch 24 whichis *adapted to receive one end of a link 25. This link is in reality yinterposed between the hu'b 6 and the 'sphere-shaped extension 23 on the inner door knob and is held in this position entirely by the notches 26 and 24 and the s rings 15 and 16 which,

`as previously descri ed, exert their pressure lon the latchplate 4, which in tu `rn istransmitted through the hub lugs to the'hub. l

The hub is therefore slidably mounted on the spindle and as such permits the knob 22 v27 (see Fig. 2). This brings the rear shoul 'ders 7 of the latch plate into the plane of the stop 14, or, inother words, to a position where the latch plate cannot ride over the stop. The latch and plate 4 therefore become locked against endwise movement as' the shoulder 7 will engage the front ends 28 of the stop 14. The hub and spindle, to-

gether with both of the knobs, are simultaneously locked against turningmovementI as c the hub cannot swing or turn when vthe latch plate 4 is locked against movement.

The latch 3 is in this manner llocked vby means of the inside knob 22 and the knobs are in turn locked against turning movement, thuseliminating .the necessity of inserting a key and operating the main bolt 9 or lock of the door.

The lock is particularly adapted for bathrooms, bed-rooms and the like and the Apivotally connected knob is, of course, positioned only on the interior side.. A person '.entering'a Xroom and desiring to temporarily and may have already stepped into the tub and then not be positive whether or not the door is locked. This vuncertainty can be obviated bythe present lock, as the position of the knob visi indicates Whether or not the', door is locke In other Words, the knob serves three functions: first, to retract or extendl the latch; secondly, to lock the latch;

and hird to visibly indicate whether or not the latch is locked. 'p

-The locka'ttachment as a whole is simple n' and substantial in construction and can readily be applied to practically any .form oflock now in use. While it ishere `illustrated as attached. toa mortise lock, it 1s obl vious that it may be attached to a rim lock 'or practically any other form of knob-oper- "ated lock. a

A modification of the lock is shown -in Fig. 4. This lock is known as the easy-latch, thatis, thelatch shown in'Fig. 1 is normally held in )the extended position by means of the spring 12. In Fig. `4 a double latch plate' has been provided. The spring 12 will here only-engage the lower'latch Y plate, which is retracted or--extended by means of the ,hub knobs, V`kwhile the upper latch plate, indicated at 30, is' slidably mounted independent' of the lower.v latch y plate, thus permitting the latch to be held in its extended position by means of a weaker spring 31.* .The two latch platesare in this' instance supported on a plane'with relation tothe stop 14 by means of springs .-15 a'nd'l` in a manner similar to that previously describedand are 'depressed to engage the stop 14 by means of the pivotal mounting of'the knob and the interposed link 25.. The link employed in both instances is channel-shape d in cross section, as shown in 5, to permit it to* straddle the spindle, which in alp iost every instance is square in cross. seclon, r v .i r I, however, wish it understood that vari Lamea ous modifications of this lstructure may be employed without departing from the spirit of the present invention within the scope of the claims, and that the materials and finish.

seen that a collar 60 is provided. This col.

lar is securely fastened by a set-screw, pin, or other means on the spindle 5 and its function is to form a seat `againstl the lock housing A when\ the knob` 22 is thrown i up against the .pressure of the springs 15 and 16.v IThis collar also renders the locking mechanism independent of the .outside knob 20; that is, the spindle cannot be lremoved or the locking mechanism vdisturbed even though the outside knob 20'is removed.

Having thus particularly described my invention, what I elaim'and desire to secure by Letters Patent is :v

1. The'combination with the latch in a lock and the -spindle whereby'it is actuated of a knob pivotally mounted on the spindle and means operated by swinging movement ofthe knob about its pivot for locking the latch against movement.'

2.. The combination with the larehfin a,

lock and the knob whereby it is retracted of means actuated by the knob for locking the latch against retraction in any manner, and

latch is locked or unlocked.

y 3. The icombinat'ion with the latch`l in a lock and the knobfwhereby it is retracted of means6 actuated'by the knob for locking the latch against retraction in any manner, and means for determining by the position of the knob whether the latch is lcked or unlocked.

.. means for visibly indicating whether ,the

4. The combination withv the llatch and' the latch plate in a door lock of a casing inclosing the same, a stop member formed in the casing over which the latch plate is nor- 'mally adapted to ride, and, means for depressingthe latch plate to bring into en` the stop and to lock the latch plate and latchl against movement.

6. AThe combination with the latch and the I t latch plate in a door lock of a casing 'inclosing the same, a stop member formed in the casing over whichthe latch plate is normally .adapted to ride, a spindle extending through the casing, a knob on the spindle, means` on i the spindle for retracting the latch; and

means on the spindle for depressing the latch plate to lock it against movement.

7 The combination with the latch and the latch plate in a door lock of a casing inelosing the same, asto member formed in the casing over which t e latch plate is normally adapted to ride, a spindle extending through the casing, a knob .on the spindle, means on the spindle for retracting the latch, and means actuated by the knob for depressing the latch plate Vto lock it and ythe latch against movement.

8. The combination with the latch and the latch plate in a door lock of a casing inclosing the same, ya stop member formed in the casing over which the latch plate is normally adapted to ride, a yieldable member adapted' to normally support the latch plate in said position, Ia spindle extending through the casing, a knob on the spindle, means on the spindle for retracting the latch and means on the spindle for depressing the latch plate to lock it against movement.

9. The combination with the latch and the latch plate in a door lock of a casing inclosing the same, a stop member formed in the casing over which the. latch plate is normally adapted to ride, a yieldable memthrough the casing,

`ber adapted to normally support the latch plate in said position, aspmdle extending` a knob on the spindle, means on the spindle for retracting the latchand means actuated by the knob for depressing the latch plate to lock it and the latch against movement.

l0. In adoor lock the combination with a latch and latch plate slidably mounted vin the casing of the lock of a spindle turnably mounted in thecasin a stop member over which the, latch p ate is normally adapted to slide, a yielding member adapted to support the latch late, ,a hub member slidably'mounted on t e s indle and means- 1for movlngthe hub on t e spindle to depress the latch plate tol a osition where it will engage the stop and) become locked agamst sliding movement.

11. In a door lock the combination with/ av latch and latch plate slidably mounted 1n the casing-of the lock of a spindle turnably mounted in the casin a stop member over. which' the 'latch p ate normally adapted to slide, a yielding member adapted to support the latch plate, a hub member slidably`mounted on the s indle, 'a 'door knob secured` on the s in controlledvby theI knob or movingl the hub lengthwise' on the spindlel to a. position e, and means where it will, engage and depress the latch plate into engagement with the stop.

12. In a door lock the combination with a latcl: and latch plate slidably mounted in the casing 'of the lock of a spindle turnably mounted 1n the casing, a stop member over which the latch plate is normally adapted to slide, a yielding member adapted to support the latch plate, a hub member slidably mounted on the'spindle, a door knob pivotally mounted on the spindle and a connecting member between the knob and the hub adapted to move the hub lengthwise upon the spindle when the knob is swung about its pivot,- said sliding movement of the hub causing the latch plate to be depressed into a position where it will c'ngage the stop and lock, the latch against movement.

13. In a door lock the combination with i a latch and latch plate slidably mounted in the casing of the lock of a spindle turnably mounted in the casing, a stop member over which the latch plate is normally adapted to slide, a yielding member adapted to support the latch plate, a hub member slidably mounted on the spindle, a door knob pi otally mounted on the spindle and a link member between the knob and the hub adapted to move the hub lengthwise upon the spindle when the knob is swung about its pivot, said sliding movement of the hub causing the latch plate to be depressed into a positlon where it will engage the stop and lock the latch against movement.

14.l The combination in a lock of the char acter described, of a latch, a spindle to op. erate the latch, and knobs on sald splndle,j

one of said knobs being pivotalli mounted on the spindle and adapted to loc the latch against retraction by means of elther knob, or otherwise, and to indicate by its posltion whether the latch is` locked or unlocked.

15. The fcombination'with the latch in a lock andthe spindle whereby it is actuated, of a knob pivotally mounted on the spindle, and means operated by swlngmg movement ofthe knob about its pivot, for locking the latch against retraction 1n any manner, and for indicating whether the latch is locked or unlocked. In testimony whereof I have hereunto set my hand in the presence of two subscrlblng wltnesses. v

WILLIAM A. VAnoY, EDGAR C. HEERMANCE. 

